feat：下拉增加默认参数

nezha-fronted/src/components/common/header.vue

@@ -219,7 +219,7 @@
           id: '',
           sn: '',
           host: '',
-          state: '',
+          state: 1,
           purchaseDate: '',
           idcId: '',
           cabinetId: '',
@@ -234,15 +234,16 @@
           accounts: [],
         },
         editAlertRule: {
-          id: "",
+          id: '',
           alertName: '',
-          type: '',
+          linkObject: {id: '', name: ''},
           expr: '',
-          last: '',
-          severity: '',
+          unit:2,
+          operator: '>',
+          last: 60,
+          severity: 'P2',
           summary: '',
           description: '',
-          receiver: '',
         },
         createMenu: [ //新增按钮内容
           {